/* Yet Another Forum.NET
 * Copyright (C) 2003-2005 Bjørnar Henden
 * Copyright (C) 2006-2013 Jaben Cargman
 * Copyright (C) 2014-2020 Ingo Herbote
 * https://www.yetanotherforum.net/
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at

 * https://www.apache.org/licenses/LICENSE-2.0

 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

namespace YAF.Core.Extensions
{
    using System.Collections.Generic;
    using System.Linq;

    using YAF.Types.Interfaces;

    /// <summary>
    /// The have sort order extensions.
    /// </summary>
    public static class HaveSortOrderExtensions
    {
        #region Public Methods and Operators

        public static IEnumerable<T> ByOptionalSortOrder<T>(
            this IEnumerable<T> sortEnumerable,
            int defaultSortOrder = 1000)
        {
            return sortEnumerable.Select(
                m =>
                    {
                        var sortOrder = defaultSortOrder;

                        if (m is IHaveSortOrder haveSortOrder)
                        {
                            sortOrder = haveSortOrder.SortOrder;
                        }

                        return new KeyValuePair<int, T>(sortOrder, m);
                    }).OrderByDescending(m => m.Key).Select(m => m.Value);
        }

        #endregion
    }
}